Any strike on Syria will be 'war on.' In US military parlance: a 'full-spectrum operation' will be heading your way. And you can call it Operation "Tip of the Iceberg" out of sheer accuracy, for a change.
Israel, in particular, appears to be victim to a false sense of security. Analysts and commentators there seem to think that the lack of a Syrian military response to recent Israeli missile strikes is a trend likely to continue. Or that Hezbollah and Iran would have no 'grounds' to climb aboard a counterattack if Syria were attacked.
The US has never predicted outcomes successfully in the Middle East and is unlikely to do so this time given that its strategic and military objectives seem even more muddled than usual
But the fact is that, to date, no member of the Resistance Axis has faced a collective western-Israeli-GCC effort to strike a blow at their core. This promised US-plus-allies strike against Syria makes their calculation an easy one: there is nowhere to go but headfirst into the fracas.